Browsing by Issue Date, starting with "2013-08-27"

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Electrical stimulation method and apparatus to stimulate nerve fibers
(2013-08-27)
Choi Charles Tak-Ming
;
Lee Yi-Hsuan
The present invention provides an electrical stimulation method and apparatus to stimulate nerve fibers, turning on suitable combination of adjacent electrodes simultaneously to form virtual channels based on predetermined rules, so that the stimulation signal will generate or evoke a nerve response spectrum that matches the original signal spectrum presented as the input sound. The method includes the steps of receiving a sound signal by a receiving unit; dividing the received sound signal into a plurality of frequency bands by a processing unit; extracting a spectral peak from each of the frequency bands and determining a stimulation sequence of frequency bands by the processing unit; and selectively driving a plurality of electrode groups in a plurality of cycles based on the stimulation sequence of frequency bands and a determination rule by the processing unit, so that the nerve response that matches the original signal will be generated.
III-V metal-oxide-semiconductor device
(2013-08-27)
Chang Edward Yi
;
Lin Yueh-Chin
A hafnium oxide layer, between a III-V semiconductor layer and a metal oxide layer is used to prevent interaction between the III-V semiconductor layer and the metal oxide layer.
Linking hydrophobicity and hydrodynamics by the hybrid fluctuating hydrodynamics and molecular dynamics methodologies
(2013-08-27)
Voulgarakis, Nikolaos K.
;
Shang, Barry Z.
;
Chu, Jhih-Wei
;
生物科技學系
;
生物資訊及系統生物研究所
The development of a hybrid fluctuating hydrodynamics (FHD) and molecular dynamics (MD) simulation method that combines the molecular dynamics of moving particles with the fluctuating hydrodynamics of solvent fields on Eulerian grid cells is presented. This method allows resolution of solute-solvent interfaces and realization of excluded volumes of particles in the presence of hydrodynamic coupling. With these capabilities, we show that the ubiquitous forces mediated by the solvent, hydrophobicity and hydrodynamics, can be linked in a mesoscopic simulation. The strategies we devise to overcome the numerical issues of mixing variables in the Eulerian and Lagrangian coordinate systems, i.e., using a pair of auxiliary fluids to realize the excluded volumes of particles and assigning collocating gridding systems on solutes to interface with solvent fields, are also presented. Simulation results show that the hybrid FHD and MD method can reproduce the solvation free energies and scaling laws of particles dynamics for hydrophobes of different sizes. The collapse of two hydrophobic particles was also simulated to illustrate that the hybrid FHD and MD method has the potential to be generally applied to study nanoscale self-assembly and dynamics-structure-function relationships of biomolecules.
Infrared absorption of 3-propenonyl (center dot CH2CHCO) radical generated upon photolysis of acryloyl chloride [CH2CHC(O)Cl] in solid para-H-2
(2013-08-28)
Das, Prasanta
;
Lee, Yuan-Pern
;
應用化學系
;
應用化學系分子科學碩博班
;
Department of Applied Chemistry
Irradiation at 193 nm of a p-H-2 matrix containing acryloyl chloride CH2CHC(O)Cl at 3.2 K yielded infrared absorption lines at 3143.6 (nu(1)), 3057.0 (nu(2)), 3048.0 (nu(3)), 2103.1 (nu(4)), 1461.0 (nu(5)), 1349.8 (nu(6)), 1223.7 (nu(11)+nu(12) or 2 nu(12)), 1092.8 (nu(8)), 918.1 (nu(9)), 691.0 (nu(10)), 624.3 (nu(11)), and 597.1 (nu(12)) cm (1) that are assigned to the 3-propenonyl (center dot CH2CHCO) radical. The assignments are based on the photolytic behavior and a comparison of observed vibrational wavenumbers and infrared intensities with those predicted with the B3PW91/aug-cc-pVDZ method. The observation is consistent with a major radical formation channel CH2CHCO + Cl followed by escape of the Cl atom from the original p-H-2 cage. The observation of 3-propenonyl (center dot CH2CHCO) radical but not 3-propenalyl (s-cis- or s-trans-CH2CH(C) over dotO) radical indicates that the former is the most stable isomer and that the barrier heights for conversion from s-cis- or s-trans-CH2CH(C) over dotO to center dot CH2CHCO are small. (C) 2013 AIP Publishing LLC.
Electronic contribution to the enhancement of the ferromagnetic ordering temperature by Si substitution in Gd-5(SixGe1-x)(4)
(2013-08-29)
Tseng, Y. C.
;
Paudyal, D.
;
Mudryk, Ya
;
Pecharsky, V. K.
;
Gschneidner, K. A., Jr.
By using a combination of x-ray spectroscopic and diffraction measurements at high pressures together with density functional theory (DFT) calculations, we show that the increase in Curie temperature T-C, induced by Si substitutions in Gd-5(SixGe1-x)(4) giant magnetocaloric materials is predominately electronically driven as opposed to lattice driven. Whereas, a lattice contraction with applied pressure increases the strength of exchange (magnetic) interactions between Gd spins, leading to a modest increase in T-C at a rate of 1.2 K/angstrom(3), much larger enhancements in T-C are obtained with Si doping for the same volume reduction (13.5 K/angstrom(3)), indicating that volume (lattice) effects are secondary. Similarly, an orthorhombic [O(II)] to monoclinic (M) structural phase transition is observed to take place with applied pressure in the paramagnetic state of a Gd-5(Si0.125Ge0.875)(4) sample at room temperature at a much smaller volume than needed to drive the same structural transition with Si doping, indicating that, even in the absence of magnetic order, electronic effects with Si doping dominate the energetics of structural transformations over lattice (volume) effects. DFT calculations show that the electronic mechanism behind this effect is a stronger Si 3p-Gd 5d than Ge 4p-Gd 5d hybridization, a critical ingredient in mediating indirect exchange interactions between localized Gd 4f spins. The results highlight the strong sensitivity of the magnetic ordering temperature to the nature of p-d hybridization, opening opportunities for tailoring the magnetocaloric properties of these compounds by substituting other p and rare-earth elements at the Si/Ge and Gd sites, respectively.
SRAM based on 6 transistor structure including a first inverter, a second inverter, a first pass-gate transistor, and a second pass-gate transistor
(2013-08-29)
CHUANG Ching-Te
;
Jou Shyh-Jye
;
Hwang Wei
;
Lin Yi-Wei
;
Tsai Ming-Chien
The present invention provides a 6T SRAM including a first inverter, a second inverter, a first pass-gate transistor, and a second pass-gate transistor. The first inverter zs a first pull-up transistor and a first pull-down transistor. The second inverter includes a second pull-up transistor and a second pull-down transistor. The gate of the second pull-up transistor is coupled with the gate of the second pull-down transistor, and the drain of the second pull-up transistor is coupled with the drain of the second pull-down transistor. The SRAM can measure the trip voltage, the read disturb voltage, and the write margin by controlling the first bit line, the second bit line, the GND, the first word line, and the voltage source without changing of the physic parameter of the SRAM.
Oscillator based on a 6T SRAM for measuring the Bias Temperature Instability
(2013-08-29)
Chuang Ching-Te
;
Jou Shyh-Jye
;
Hwang Wei
;
Tsai Ming-Chien
;
Lin Yi-Wei
The present invention provides an oscillator which is based on a 6T SRAM for measuring the Bias Temperature Instability. The oscillator includes a first control unit, a first inverter, a second control unit, and a second inverter. The first control unit is coupled with the first inverter. The second control unit is coupled with the second inverter. The first control unit and the second control unit is used to control the first inverter and the second inverter being selected, biased, and connected respectively, so that the NBTI and the PBTI of the SRAM can be measured separately, and the real time stability of the SRAM can be monitored immediately.
CLOUD-BASED MULTIMEDIA TEACHING SYSTEM, DEVELOPMENT METHOD AND INTERACTION METHOD THEREOF
(2013-08-29)
SUN Jerry Chih-Yuan
;
Walsh John P.
;
Misiaszek Greg
The present invention discloses a cloud-based multimedia teaching system, a development method and an interaction method thereof. In the present invention, a teacher produces a course in the Abode Flash format and uploads it from a client computer to a multimedia teaching system via the cloud; the multimedia teaching system communicates with a back-end server via a server framework in the Flash Remoting technology and establishes the course in the back-end server; the user interface of the multimedia teaching system contains a plurality of buttons linked to the courses. When a user clicks on a button of the user interface to select a course, the multimedia teaching system retrieves related data of the course from the back-end server via the server framework in the Flash Remoting technology and presents the data on the user interface thereof.
Poly(ethylene glycol) modified activated carbon for high performance proton exchange membrane fuel cells
(2013-08-30)
Tsai, Li-Duan
;
Chien, Hung-Chung
;
Wang, Cheng-Hong
;
Lai, Chien-Ming
;
Lin, Jiunn-Nan
A high water retention membrane is developed by co-assembling poly(ethylene glycol) (PEG) grafted activated carbon (AC-PEG) with Nafion. The AC-PEG is prepared via a sol gel process. The use of PEG as a transporting medium in AC-PEG shows a largely improved water retention ability, a higher proton conductivity and a reduced swelling ratio, making it well suited for proton exchange membrane fuel cells (PEMFCs). Further, the composite membranes show improved mechanical properties at high temperature, thus ensuring the structural stability of membranes during the fuel cell operation. Compositional optimized AC-PEG/Nafion composite membrane (15 wt% compared to Nafion) demonstrates a better performance than the commercially available counterpart, Nafion 212, in fuel cell measurements. To identify the key factor of the improved performance, current interrupt technique is used to quantitatively verify the changes of resistance under different relative humidity environment. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Modeling contaminant transport in a two-aquifer system with an intervening aquitard
(2013-08-30)
Liu, Chih-Tien
;
Yeh, Hund-Der
;
Yeh, Li-Ming
;
環境工程研究所
;
應用數學系
This study deals with the issue of one-dimensional solute transport in a two-aquifer system, where an aquitard lies between two aquifers. Different from previous studies on analysis of the contaminant transport affected by the presence of an aquitard, we developed a mathematical transport model in an aquifer-aquitard-aquifer system with considering transport of solutes in the aquitard governed by both advection and diffusion. The Laplace-domain solution of the model for concentration distributions is obtained by the Laplace transform technique and its corresponding time-domain results are computed numerically by using Laplace numerical inversion. An explicit finite difference model is also developed to simulate two-dimensional contaminant transport process in the system. The simulated depth-averaged concentrations in the lower and upper aquifers slightly differ from those predicted by the present solution. The results show that the movement of contaminant in the upper aquifer is slowed down considerably due to the advective transport in aquitard. When neglecting the aquitard advection (a zero Pedet number), the concentration level in the lower aquifer will be underestimated, especially at late times. In addition, the contaminant concentration in the lower aquifer increases significantly with aquitard's Peclet number. (C) 2013 Elsevier B.V. All rights reserved.
Enhanced particle destabilization and aggregation by flash-mixing coagulation for drinking water treatment
(2013-08-30)
Lin, Jr-Lin
;
Pan, Jill R.
;
Huang, Chihpin
;
環境工程研究所
;
生物科技學系
In water treatment plants (WTPs), the operation of rapid mixing in coagulation units dominates particle destabilization and the formation of flocs. The goal of this study was to investigate the effect of enhanced rapid-mixing intensity (velocity gradient [G]) on the performance of coagulation for natural turbid water treatment. Two surface-water samples of low and high turbidity were coagulated by using polyaluminum chloride (PACl), with G values ranging from 200 to 800 s(-1),and the destabilization of particles and dissolved organic matter (DOM) was determined, followed by measurement of filterability of the supernatant. Furthermore, the effect of high rapid mixing on the coagulation efficiency was studied by using a pilot-scale, in-line instantaneous flash mixer (IFM) which could generate much higher G than a conventional mechanical mixing of WTP. The results of Jar test showed that the enhanced reduction in turbidity was accompanied by the improved filterability of the supernatant, which was due to the formation of larger flocs with strong structure in response to higher rapid-mixing intensity, especially for low-turbidity water. It was found that the fractal dimension (D-f) of coagulated flocs is inversely proportional to the recovery factor of broken flocs. The in-line IFM with intensive mixing (G > 5000 s(-1)) substantially improved the removal of particles and DOM, as a result of the formation of large flocs. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
Growth of lattice-matched InAlN/GaN on Si (111) substrate for ultraviolet photodiode application
(2013-09-01)
Binh Tinh Tran
;
Chang, Edward Yi
;
材料科學與工程學系
;
Department of Materials Science and Engineering
In this paper, we report on the growth of high quality In (x) Al1-x N/GaN hetero-structures on Si substrate by metal organic chemical vapor deposition with various indium compositions (x = 10.2, 16.2 and 17.6%). The lattice-matched In0.176Al0.838N/GaN structure shows a smooth surface with good crystalline quality. In addition, the ultraviolet photodiode device shows excellent device characteristics with a low leakage current of 0.12 A mu A, and a high spectral response. It has good quantum efficiency of 94 mA/W and 44% at 265 nm which is comparable to that of the InAlN photodiode grown on sapphire substrate.
Deriving the Vehicle Speeds from a Mobile Telecommunications Network
(2013-09-01)
Liou, Ren-Huang
;
Lin, Yi-Bing
;
Chang, Yu-Long
;
Hung, Hui-Nien
;
Peng, Nan-Fu
Vehicle speeds are often measured by intelligent transportation systems (ITSs) by utilizing sensors or software solutions. Our previous work proposed the Lin-Chang-Huangfu (LCH) scheme to compute the cell residence times by the standard counter values in mobile telecommunications switches. In this paper, we use mathematical and statistical developments to investigate the accuracy of the LCH scheme by deriving the bias of the cell residence times computed in this scheme. Then, we extend the LCH scheme with some filtering and compensation techniques for vehicle speed estimation and validate our approach with vehicle detector (VD) measurements at National Highway 3, Longtan Township, Taoyuan County, Taiwan. Our study indicates that the LCH scheme is an effective approach to vehicle speed estimation.
「溫度」
(深河出版有限公司, 2013-09-01)
晨野
Critical point defect detection for small-pixel thin-film transistor array applied to medical display
(2013-09-01)
Wang, Yao-Chin
;
Lin, Bor-Shyh
;
光電系統研究所
;
影像與生醫光電研究所
;
生醫電子轉譯研究中心
羅時成教授專訪
(國立陽明大學, 2013-09)
方諾妮
Predictors of survival and neurologic outcomes in children with traumatic out-of-hospital cardiac arrest during the early postresuscitative period
(2013-09-01)
Lin, Yan-Ren
;
Wu, Han-Ping
;
Chen, Wen-Liang
;
Wu, Kuan-Han
;
Teng, Tsung-Han
BACKGROUND: The outcome of children with traumatic out-of-hospital cardiac arrest (OHCA) is poor, and the information regarding survival in the postresuscitative period is limited. The aim of this study was to determine the clinical features during the early postresuscitative period that may predict survival or neurologic outcomes in children with traumatic OHCA. METHODS: Information on 362 children (<19 years) who presented to the emergency departments of three medical centers and experienced traumatic OHCA during the study period (January 2003 to December 2010) were retrospectively included. The postresuscitative clinical features during the early postresuscitative period, defined as the first hour after achieving sustained return of spontaneous circulation, which correlated with survival and neurologic outcomes were analyzed. RESULTS: Among 152 children (42%) who achieved sustained return of spontaneous circulation, 34 (9.4%) survived to discharge, and 11 (3%) had good neurologic outcomes (Pediatric Cerebral Performance Category Scale, 1 or 2). Early postresuscitative clinical features, which reflected initial cardiac output and end-organ perfusion, can predict the chance of survival. Such features included the following: high or normal blood pressure, normal heart rate, sinus rhythm, urine output of more than 1 mL/kg per hour, and noncyanotic skin color (all p < 0.05). Initial Glasgow Coma Scale (GCS) score of greater than 7 predicted a good neurologic outcome in survivors (p = 0.008). CONCLUSION: Predictors of survival were high or normal blood pressure, normal heart rate, sinus rhythm, urine output of more than 1 mL/kg per hour, and noncyanotic skin color. Most importantly, initial GCS score of greater than 7 predicted a good neurologic outcome in survivors. (Copyright (C) 2013 by Lippincott Williams & Wilkins)
「我感受到…父親的亡魂」：艾騰．伊格言電影中的創傷與翻譯
(國立陽明交通大學出版社, 2013-09-01)
蕭瑞莆
人類在上一個世紀完成許多壯舉也同樣地留下一些對生靈包括人類自己都無法磨滅的傷害，例如種族大屠殺。亞美尼亞裔加拿大導演艾騰．伊格言的《A級控訴》（2002）作為首部有關發生於1915年至1923年的亞美尼亞種族大屠殺電影，至今仍引發爭議。爭議焦點多在電影作為再現歷史的媒介是否為達美學效果而犧牲了歷史真實。這個疑問其實是個古老問題，口述、文字及影像如何可能代表、詮釋、或翻譯所指物或事件。同時，在大屠殺受難者一代接著一代逐漸凋零的現在，更重要的是《A級控訴》如何處理否認種族大屠殺的後續效應，並自種族大屠殺後世代的位置（加拿大多元文化主義語境的亞美尼亞離散族裔，以及其他族群）反省歷史文化遺產的意義。伊格言與伊恩．貝福在《字幕：論電影中的外異性》指出，「每一部電影都是外國電影，外異於某處某一位觀眾，且並非僅就語言而言」。我們不禁好奇，之於伊格言什麼是翻譯？為何需要翻譯？以及參與翻譯活動如何使主體與客體對象發生轉變？本論文整理主張保持外國語陌生／外異性的翻譯觀，如班雅明、里克爾、與安竹．班哲民的語言哲學，以及他整理拉普郎虛對佛洛依德無意識的討論，亦即「無意識作為（被）翻譯」的場域，嘗試描繪伊格言的翻譯觀。進而援引賀栩的「後－記憶」以及「家人觀看／觀看家人」的觀視位置，閱讀短片《Arshile的畫像》（1995）以及《A級控訴》的重要片段。我要指出，伊格言透過拉非與希莉亞的對話場景側面提出他的翻譯觀，並回應美學相對於歷史真實的爭議。發生於黑暗房間的事件是觀影活動的寓言，歷史事件如何向我們顯現，端看是否能夠打開所謂自保的身分認同的疆界。
Dynamic origin-destination demand flow estimation under congested traffic conditions
(2013-09-01)
Lu, Chung-Cheng
;
Zhou, Xuesong
;
Zhang, Kuilin
;
運輸與物流管理系註：原交通所+運管所
;
Department of Transportation and Logistics Management
This paper presents a single-level nonlinear optimization model to estimate dynamic origin destination (OD) demand. The model is a path flow-based optimization model, which incorporates heterogeneous sources of traffic measurements and does not require explicit dynamic link-path incidences. The objective is to minimize (i) the deviation between observed and estimated traffic states and (ii) the deviation between aggregated path flows and target OD flows, subject to the dynamic user equilibrium (DUE) constraint represented by a gap-function-based reformulation. A Lagrangian relaxation-based algorithm which dualizes the difficult DUE constraint to the objective function is proposed to solve the model. This algorithm integrates a gradient-projection-based path flow adjustment method within a column generation-based framework. Additionally, a dynamic network loading (DNL) model, based on Newell's simplified kinematic wave theory, is employed in the DUE assignment process to realistically capture congestion phenomena and shock wave propagation. This research also derives analytical gradient formulas for the changes in link flow and density due to the unit change of time-dependent path inflow in a general network under congestion conditions. Numerical experiments conducted on three different networks illustrate the effectiveness and shed some light on the properties of the proposed OD demand estimation method. (C) 2013 Elsevier Ltd. All rights reserved.
Real options game over the business cycle
(2013-09-01)
Huang, Hsing-Hua
;
Chuang, Wei-Liang
;
資訊管理與財務金融系註：原資管所+財金所
;
Department of Information Management and Finance
This paper studies the impact of business cycles on firms' strategic investment decisions by developing and solving a continuous time regime-dependent real options game in an asymmetric duopoly. The value functions, roles and optimal investment timing decisions of the two firms in the expansion and recession states are jointly determined. We show that the preemptive investment equilibrium, where the leader invests earlier than its own first-best investment timing, is pro-cyclical. Moreover, the simultaneous investment equilibrium, where the firms simultaneously invest late and enjoy waiting flexibility as a tacit collusion, is counter-cyclical. In addition, we specifically demonstrate that the values of the leader and follower in the expansion state are smaller than those in the recession state when the preemptive equilibrium prevails in the expansion state and the simultaneous equilibrium prevails in the recession state. (C) 2013 Elsevier B.V. All rights reserved.